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US 5,665,985 AGranted
Light-emitting diode of edge-emitting type, light-receiving device of lateral-surface-receiving type, and arrayed light source
AssigneeRicoh Company, Ltd.
InventorHirokazu Iwata
Life of this patent
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Abstract
A semiconductor device includes a semiconductor substrate, and a plurality of semiconductor layers formed on the semiconductor substrate and forming a concave lateral surface, the semiconductor layers including an active layer for either emitting light or receiving light, wherein the concave lateral surface is used as either a light-emitting surface or a light-receiving surface.
Claims11
A semiconductor device of an edge emitting type comprising:
- a semiconductor substrate;
- and
- a plurality of semiconductor layers formed on said semiconductor substrate and each having an inwardly curved edge to form a concave lateral surface in a horizontal direction said semiconductor layers including an active layer for emitting light, wherein said concave lateral surface is used as a light-emitting surface.
A light-emitting device comprising:
- a light-emitting diode of an edge emitting type having a first concave lateral surface which is curved in a horizontal direction and serves as a light-emitting surface;
- a semiconductor substrate;
- and
- a plurality of first semiconductor layers formed on said semiconductor substrate and having inwardly curved edges to form a second concave lateral surface, said first semiconductor layers including an active layer for receiving light, wherein said second concave lateral surface is used for receiving light emitted from said light-emitting diode.
1 more element
An arrayed light source comprising:
- a semiconductor substrate;
- and
- a plurality of light-emitting diodes of an edge emitting type formed on said semiconductor substrate in at least one line with light-emitting surfaces of said light-emitting diodes being presented in the same direction,
- wherein each of said light-emitting diodes has a plurality of semiconductor layers formed on said semiconductor substrate and each having an inwardly curved edge to form a concave lateral surface in a horizontal direction as said light-emitting surface, said semiconductor layers including an active layer for emitting light, said concave lateral surface being used as said light-emitting surfaces.
1 more element
An arrayed light source comprising:
- a semiconductor substrate;
- a plurality of light-emitting diodes of an edge-emitting type formed on said semiconductor substrate in at least one line with light-emitting end surfaces of said light-emitting diodes being presented in the same direction;
- and
- at least one light-receiving device having a plurality of first semiconductor layers formed on said semiconductor substrate and having inwardly curved edges to form a first concave lateral surface, said first semiconductor layers including an active layer for receiving light, said first concave lateral surface being used for receiving light emitted from at least one of said light-emitting diodes,
- wherein said light-emitting diodes are formed from a plurality of second semiconductor layers formed on said semiconductor substrate, said plurality of second semiconductor layers having inwardly curved edges to form a second concave lateral surface as said light emitting surfaces and having the same layer structure in a monolithic form as that of said first semiconductor layers.
2 more elements
Dependencies are inferred from the claim text.